Optic projection : principles, installation and use of the magic lantern, projection microscope, reflecting lantern, moving picture machine, fully illustrated with plates and with over 400 text-figures (1914)

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CHAPTER VIII PREPARATION OF LANTERN SLIDES § 310. Apparatus and Material for Chapter VIII: A photographic dark room; Camera with suitable objectives and plate holders (fig. 116-119); Lantern-slide plates, negative plates of various kinds; Chemicals for developing, etc.; Colors and brushes for tinting the slides; A retouching frame (fig. 113); Cover-glasses and binding strips and mats for the slides ; Markers and labels for the slides; Cabinet for the slides (fig. 120). § 311. For the historical development of lantern slides see the works referred to in Ch. I, § 2, and for photographic lantern slides, The Journal of the Royal Society of Arts, Vol. LIX (191 1), pp. 255-257 For making and coloring lantern slides see the works inCh. I, § 2, and Lambert, Lantern-slide making and coloring. The Photo-Mineature series No. 9, Lantern Slides, and No. 83, Coloring Lantern Slides. § 312. Modern lantern slides are of several standard sizes as follows: (See§3i2a). A. American slides. — These are oblong plates 82.5 x 102 mm. (3^ x 4 inches). They are designed to go into the lantern -slide carrier with the long side horizontal (§ 35). B. British slides. — These are square, being 82.5 x 82.5 mm. (3 Y* x Z% inches) (§37). C. French slides. — These are, following the recommendations of the French Congress of Photography for 1889, 85x100 mm. (3n/32 x 3lrri6 inches). That is, the standard is practically like the American, and French slides can be used in American lantern-slide carriers. D. German slides. — In Germanic countries, slides of 85 x 100 mm. are much used, but the German standard is often given as 90 x 120 mm. (3%; x \y± inches). Those of 130 x 180 mm. are likewise employed.